A389191 Number of fixed polyhexes of area n with holes.

0, 0, 0, 0, 0, 1, 12, 99, 696, 4476, 27249, 159940, 915113, 5139576, 28466304, 155985402, 847589346, 4574772507, 24557645009, 131237632524, 698734393764, 3708569673741, 19631253013419, 103682149851363, 546526154952085, 2875951591143054, 15111570987672656

Offset

1,7

Links

Table of n, a(n) for n=1..27.

Formula

a(n) = A001207(n) - A121220(n).

Crossrefs

Cf. A001207, A038144, A121220, A389190.

Sequence in context: A133652 A004058 A395902 * A052178 A322721 A367607

Adjacent sequences: A389188 A389189 A389190 * A389192 A389193 A389194

Keyword

nonn

Author

John Mason, Sep 25 2025

Status

approved